CVE-2026-18690
Improper Authorization in MongoDB Server Allows Unauthorized Actions on System Collections
Description
An issue in MongoDB Server could allow an authenticated user with a limited database-scoped role to perform an action against protected system collections that their assigned privileges should not permit. This could result in critical system collections being dropped and recreated without proper authorization.
INFO
Published Date :
Aug. 11, 2026, 7:17 p.m.
Last Modified :
Oct. 23, 2026, 9:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | a39b4221-9bd0-4244-95fc-f3e2e07f1deb | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | MITRE-CVE | ||||
| CVSS 4.0 | HIGH | a39b4221-9bd0-4244-95fc-f3e2e07f1deb | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update MongoDB Server to the latest version.
- Review and enforce least privilege principles.
- Restrict access to system collections.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-18690.
| URL | Resource |
|---|---|
| https://jira.mongodb.org/browse/SERVER-130481 | Vendor Advisory Issue Tracking |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-18690 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-18690
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-18690 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-18690 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 23, 2026
Action Type Old Value New Value Added Translation Title: MongoDB Server de MongoDB, Description: Un problema en el servidor MongoDB podría permitir a un usuario autenticado con un rol limitado de ámbito de base de datos realizar una acción contra colecciones de sistema protegidas que sus privilegios asignados no deberían permitir. Esto podría resultar en que colecciones de sistema críticas sean eliminadas y recreadas sin la autorización adecuada. -
Initial Analysis by [email protected]
Sep. 16, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:* versions from (including) 8.3.0 up to (excluding) 8.3.8 *cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:* versions from (including) 7.0.0 up to (excluding) 7.0.40 *cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (excluding) 8.0.29 *cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:* versions from (including) 8.2.0 up to (including) 8.2.12 *cpe:2.3:a:mongodb:mongodb:9.0.0:alpha0:*:*:-:-:*:* *cpe:2.3:a:mongodb:mongodb:9.0.0:alpha1:*:*:-:-:*:* *cpe:2.3:a:mongodb:mongodb:9.1.0:alpha0:*:*:-:-:*:* Added Reference Type MongoDB, Inc.: https://jira.mongodb.org/browse/SERVER-130481 Types: Issue Tracking, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 11, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-18690', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-11T20:20:12.680432Z'} -
New CVE Received by [email protected]
Aug. 11, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'MongoDB', 'product': 'MongoDB Server', 'versions': [{'status': 'affected', 'version': '8.3.0', 'lessThan': '8.3.8', 'versionType': 'semver'}, {'status': 'affected', 'version': '8.0', 'lessThan': '8.0.29', 'versionType': 'semver'}, {'status': 'affected', 'version': '7.0', 'lessThan': '7.0.40', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] Added Description An issue in MongoDB Server could allow an authenticated user with a limited database-scoped role to perform an action against protected system collections that their assigned privileges should not permit. This could result in critical system collections being dropped and recreated without proper authorization. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H Added CWE CWE-863 Added Reference https://jira.mongodb.org/browse/SERVER-130481